ScienceAncient Eye Contains 300 Million-Year-Old Rods and Cones Eye cells found in ancient fish suggests color vision evolved at least 300 million years ago. Finding represents the oldest vertebrate photosensor cells ever found, researchers say.by Jim Algar
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ScienceScientists Discover Rods and Cones in 300-Million-year-old Fish Eyes. What Findings Suggestby Sumit Passary